A boat moving at 8.6 km/hr relative to the water is crossing a river 5.1 km wide in which the current is flowing at 4.0 km/hr. At what angle upstream should the boat head to reach a point on the other shore directly opposite the starting point? (Assume 0 degrees is straight across, and give the angle in degrees as a positive value with no units.)

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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A boat moving at 8.6 km/hr relative to the water is crossing a river 5.1 km wide in which the current is flowing at 4.0 km/hr. At what angle upstream should the
boat head to reach a point on the other shore directly opposite the starting point? (Assume 0 degrees is straight across, and give the angle in degrees as a
positive value with no units.)
Transcribed Image Text:A boat moving at 8.6 km/hr relative to the water is crossing a river 5.1 km wide in which the current is flowing at 4.0 km/hr. At what angle upstream should the boat head to reach a point on the other shore directly opposite the starting point? (Assume 0 degrees is straight across, and give the angle in degrees as a positive value with no units.)
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